Spray-head for atomizers.



T. A. DE VILBISS. SPRAY HEAD FOR ATOMIZERS. APPLICATION FILED MAY 2. 1908.

Patented Dec. 1, 1908.

INVENTOR.

WITNESSES; 6 WW W W UNlTED STATES PATENT or rion.

:rHOMAs A. DE vnnnss, or TOLEDO, OHIO, A ssI NOR TO THE on VILBISS MANUFACTURING;

COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

' SPRAY-HEAD FOR n'ro urznns.

Specification of Letters Patent.

Patented Dec. 1, 1908. I

Application filed ma 2, 1908. Serial No. camera To all whom it may concern:

Be it known that I, THOMAS A. Di: VIL- .BISS, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Spray-Head for Atomizers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable Others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the-figures of reference marked thereon, which form a part of this specification. V

, My invention relates toatomizers of the" vacuum type wherein the liquid to be sprayed is drawn from its receptacle through a suitable conduit and discharged therefrom the air blast is caused to operate on the dis-- charge end of the liquid-tube in such mannor as to effect a stronger and more efiicient and voluminous spray than is possible with the forms of spraying-heads now in use.

The invention is fully described in the following specification and illustrated in the accompanying drawings, in which,-

Figure 1 is a central vertical section of an atomizer bottle and its tubes embodying my invention, and Fig.2 is an enlarged central longitudinal section of the discharge ends of the air and liquid tubes and .associated spraying-head' Referring to the drawings, 1 designates any suitable form of liquid bottle or receptaole, to the neck of which is secured a cap or other closure member 2, which carries the air-tube 3 and the liquid-tube 4 in a suitable manner. The liquid-tube at, which is smaller in diameter than the air-tube 3, telescopes at its outer end in the discharge end of said air-tube and is maintained positively centered therein by the spray-head or plug 5. This-spray-head is axially bored, as at 6, and fits closely into the end of the air-tube and onto the liquid tube slightly to the rear of its end, being preferably threaded to the latter to draw the head closely to its seat within the outer tube when turned in the proper direction. The end of the liquid-tube or in anyother manner.

which projects within the bore 6 of the head is reduced in advance of its point of coaction with said tube toform the restricted discharge-nozzle 7, as shown, thus providing an annular space between it and the wall of the spraying-head throat; or bore. This annular space is in communication with the air-tube through a plurality of openings 8 in the wall'ofthe plug or head and the space or spaces Sprovided around the inner end portion thereof by annularly reducing the same The outer end of the bore or throat of the V spray-head is restricted or contracted, as at 10, and the end of the nozzle 7 projects within this restriction freeI-ffrom contact with its wall and short ofthe outer'end through the openings 8 to thoroughly em I velop the nozzle and be dischar ed in a perfect cylindrical stream around t e nozzle end with greater force and eiicctiveness than would be the case if the air had a free and unrestricted exhaust from the spray-head chamber.

It is absolutely necessary to the perfect operation of an atomizer of the vacuumtype that the nozzle end of the inner tube terminate within't-he restriction l0 and not short thereof or within the chamber or enlarged portion 6 of the spray-head bore, as

in the latter case the reaction and deflection from the liquid in the bottle at the inner end of the liquid-tube. It is also essential to anefficient operation of the spray-head that the nozzle endteriiiinate short of the outer end of the restricted portion of the bore, as otherwise the expansion of the air v as it leaves the end of the discharge-throat of the head would cause it to lose its effectiveness on the nozzle end.-

In use, the air 1n the tube 3 flows under pressurethrough the opening 8 and into the 2 see,

chamber 6 around the nozzle'i. The compressing of the air Within such chamber due to the contracting of the mouth th reef around the nozzle 7 causes the air to be equally distributed around the nozzle and then discharged in increased force from the chamber through the restricted annular 'space around the end of the nozzle, thus creating a suction at the nozzle end and inducing a flow of liquid therefrom which mingles with the air and is discharged in the form of spray or vapor from the sprayhead.

Having thus described my invention, what I claim as new and desire to secure by Let-- ters Patent, is,

1. In a vacuum atomizer, the combination With. an outer air-tube, and an inner liquidtnbe having a contracted nozzle at the end, i ,of a spray-head fitted into the end of the outer tube and onto the inner tube to the rear of the nozzle and. having a bore which is contracted at its outer end and communicates with the outer tube, said nozzle being spaced from the bore to provide an airchamber therearound and having its end terminating Within the contracted portion thereof and short of its outer end.

2'. In a Vacuum atomizer, the combination with. an outer air-tube, and an inner liquidtube haiin a contracted nozzle at the end, of :1 head ntted into the' outer and onto the inner tube, whereby to relatively center the same, and having a bore which is contracted at its outer end and communicates with the outer tube, said nozzle being spaced from the bore and having its end terminating within said contracted portion short of the outer end thereof. 4

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing Witnesses THOAlAS it. DE Vii/BIS Witnesses HAZEL B. Hnrr'r, C. N. Owns. 

